A) \[\frac{40\sqrt{3}}{\sqrt{3}+1}\]
B) \[40\sqrt{3}\,\,m\]
C) \[\frac{40\sqrt{3}}{\sqrt{3}-1}\,\,m\]
D) None of these
Correct Answer: C
Solution :
Tricky Approach Here, \[h=?,\] \[x=40\] \[{{\theta }_{1}}=60{}^\circ ,\] \[{{\theta }_{2}}=45{}^\circ \] \[\therefore \] \[h=\frac{40}{\cot 45{}^\circ -\cot 60{}^\circ }\] \[=\frac{40}{1-\frac{1}{\sqrt{3}}}=\frac{40\sqrt{3}}{\sqrt{3}-1}\] \[\therefore \] \[h=\frac{40\sqrt{3}}{\sqrt{3}-1}\,m\]You need to login to perform this action.
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